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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
1da177e4 LT |
2 | /* |
3 | * A security identifier table (sidtab) is a hash table | |
4 | * of security context structures indexed by SID value. | |
5 | * | |
7efbb60b | 6 | * Author : Stephen Smalley, <sds@tycho.nsa.gov> |
1da177e4 LT |
7 | */ |
8 | #ifndef _SS_SIDTAB_H_ | |
9 | #define _SS_SIDTAB_H_ | |
10 | ||
11 | #include "context.h" | |
12 | ||
13 | struct sidtab_node { | |
14 | u32 sid; /* security identifier */ | |
15 | struct context context; /* security context structure */ | |
16 | struct sidtab_node *next; | |
17 | }; | |
18 | ||
19 | #define SIDTAB_HASH_BITS 7 | |
20 | #define SIDTAB_HASH_BUCKETS (1 << SIDTAB_HASH_BITS) | |
21 | #define SIDTAB_HASH_MASK (SIDTAB_HASH_BUCKETS-1) | |
22 | ||
23 | #define SIDTAB_SIZE SIDTAB_HASH_BUCKETS | |
24 | ||
25 | struct sidtab { | |
26 | struct sidtab_node **htable; | |
27 | unsigned int nel; /* number of elements */ | |
28 | unsigned int next_sid; /* next SID to allocate */ | |
29 | unsigned char shutdown; | |
73ff5fc0 EP |
30 | #define SIDTAB_CACHE_LEN 3 |
31 | struct sidtab_node *cache[SIDTAB_CACHE_LEN]; | |
1da177e4 LT |
32 | spinlock_t lock; |
33 | }; | |
34 | ||
35 | int sidtab_init(struct sidtab *s); | |
36 | int sidtab_insert(struct sidtab *s, u32 sid, struct context *context); | |
37 | struct context *sidtab_search(struct sidtab *s, u32 sid); | |
12b29f34 | 38 | struct context *sidtab_search_force(struct sidtab *s, u32 sid); |
1da177e4 LT |
39 | |
40 | int sidtab_map(struct sidtab *s, | |
41 | int (*apply) (u32 sid, | |
42 | struct context *context, | |
43 | void *args), | |
44 | void *args); | |
45 | ||
1da177e4 LT |
46 | int sidtab_context_to_sid(struct sidtab *s, |
47 | struct context *context, | |
48 | u32 *sid); | |
49 | ||
50 | void sidtab_hash_eval(struct sidtab *h, char *tag); | |
51 | void sidtab_destroy(struct sidtab *s); | |
52 | void sidtab_set(struct sidtab *dst, struct sidtab *src); | |
53 | void sidtab_shutdown(struct sidtab *s); | |
54 | ||
55 | #endif /* _SS_SIDTAB_H_ */ | |
56 | ||
57 |